The Advanced Photon Source (APS) POLAR beamline is building a new instrument, named MagXES, that leverages the polarization dependence of the x-ray emission process to increase the sensitivity of magnetism-dependent x-ray measurements. This instrument will take advantage of the sub-micrometer beam size, advanced x-ray polarization control, high magnetic field, low temperature, and high-pressure capabilities of the new POLAR beamline. MagXES will, therefore, enable high-throughput element-resolved measurements of magnetism and electronic properties at extreme conditions. The Magnetic Materials group in the X-ray Science Division seeks a Postdoctoral Appointee to contribute to the technical and scientific development of the MagXES spectrometer. The successful candidate will contribute to the spectrometer design and installation, as well as to the development of x-ray analyzers. Focus is expected to be placed on enabling high-pressure experiments, particularly using nanofabrication methods to tailor the high-pressure environment. Experiments will center on strongly correlated and topological systems using the MagXES as well as other x-ray spectroscopy and scattering probes. **Position Requirements** Required: + This level of knowledge is typically achieved through a formal education in Physics, Materials Science, Chemistry, or a related field at the PhD level with zero to five years of employment experience + Experience with synchrotron-based x-ray spectroscopy and/or scattering techniques + Excellent oral and written communication skills + Ability to model Argonne's Core Values: Impact, Safety, Respect, Integrity, and Teamwork + Ability to understand, value, and promote diversity, equity, inclusion, and accessibility Preferred: + Background in condensed matter physics + Experience with single crystal diffraction, x-ray analyzers, and x-ray detectors + Experience with high pressure diamond anvil cell technology and/or nanofabrication tools (particularly focused ion beam and lithography) + Familiarity with scientific programing languages such as Python + Experience with design software such as Autodesk Inventor, SolidWorks, Creo **Job Family** Postdoctoral Family **Job Profile** Postdoctoral Appointee **Worker Type** Long-Term (Fixed Term) **Time Type** Full time _As an equal employment opportunity and affirmative action employer, and in accordance with our core values of impact, safety, respect, integrity and teamwork, Argonne National Laboratory is committed to a diverse and inclusive workplace that fosters collaborative scientific discovery and innovation. In support of this commitment, Argonne encourages minorities, women, veterans and individuals with disabilities to apply for employment. Argonne considers all qualified applicants for employment without regard to age, ancestry, citizenship status, color, disability, gender, gender identity, gender expression, genetic information, marital status, national origin, pregnancy, race, religion, sexual orientation, veteran status or any other characteristic protected by law._ _Argonne employees, and certain guest researchers and contractors, are subject to particular restrictions related to participation in Foreign Government Sponsored or Affiliated Activities, as defined and detailed in United States Department of Energy Order 486.1A. You will be asked to disclose any such participation in the application phase for review by Argonne's Legal Department._ _All Argonne offers of employment are contingent upon a background check that includes an assessment of criminal conviction history conducted on an individualized and case-by-case basis. Please be advised that Argonne positions require upon hire (or may require in the future) for the individual be to obtain a government access authorization that involves additional background check requirements. Failure to obtain or maintain such government access authorization could result in the withdrawal of a job offer or future termination of employment._